Answer this question truthfully
### Question: What causes Chronic cold urticaria?
### Response: Though it is not clear what causes cold urticaria, it appears that some people have hypersensitive skin cells. This means that their skin cells are more sensitive than a normal person's skin cells to things like temperature. This may be a result of either an inherited trait or an illness (for example, a virus). Since exposure to cold begins the immune response that releases histamine and other immune system chemicals, the skin may become itchy and exhibit redness and other symptoms.